Help with linux comes in two forms. The short help is with the '--help' arguement. For example 'ls --help' gives help with the list command. This will of course roll off the screen so a better command is 'ls --help|more'. Repeated pressing of the enter key will scroll you through the 'piped' help screen. Pipes are where one command feeds a second command. Here the 'ls --help' pipes to the 'more' command. The '|' is the pipe delimitor.
The more extensive help is retrieved from manuals. To see the manual on a command use the man function. For example: 'man ls' will tell you everything you ever wanted to know about listing.
All manules are 'scroll-able' using the up and down cursor keys. Exit the manual by typing q to the ':' prompt rather than cursor up or down.
| man ls | You are going to be using this command a lot so you might want to read more on it. |
| man more | Information is presented a screen at a time with this command. |
| man less | Actually I find 'less' to be more useful than 'more' as a file viewer. If that last sentenance did not confuse you then you might be right for Linux. |
| man mount | Not the clearest of explinations. There is a lot of information here though. |